Electric warp stop-motion for looms.



PATBNTED JUNE 12, 1906.

e. E. CHANDLER. Engpmm WARP STOP MOTION FOR LOOME APPLIOATION FILED SEPT. 26. 1905.

rinrrnn s'rerrns ra rnrrr torsion.

GEORGE E. CHANDLER, OF TAUNTON, MASSACHUSETTS, ASSIG'NOR MASON MACHINE WORKS, OF TA'UNTON, MASSACHUSETTS, A

PORATION OF MASSACHUSETTS.

tion with the accompanying -drawings,.is a

specification, like numerals on the drawings representing like parts.

This mvention' relates particularly to warp stop-motions for looms wherein the breakage of a warp-thread is made ell'ective to cause'a chan e. in the condition of an electric cii'cuit, and thereby etc the loom automatically.

The object o' my invention'is the provision' of'means for effecting the operatlon of the stop-motion when the lay is on its backward stroke, the warp then being in full tension.

By rendering the stop --motion inactive when the layis on its forward'stroke or beat it will be manifest that loom stop'page cannot be caused by slack threads inerely' a s is now frequently the case, and by making the opleration of the stop-motion possible only W on the warp is in full tension, in accord ance with my invention, it'will be'obvious that a broken warp-thread only can cause loom-stoppage. r

So far as I am aware this is broadly new in electric warp stop1notions, and accordingly my invention is not restricted to the'prec-ise construction and arrangement herein shown and described, as the same is but one practlcal embodiment'ofmy invention.

The various novel features of my invention will be fully described in the subjoined specification and particularly pointed out in the following clalms.

Figure 1 is a partiai'transverse section and righthand side elevation of a loom with one vice (shown as the armature of an electromagnet) being indicated. in different posit1ons; and Fig.4 is a similar detail showing Specification of Letters Patent. Application filed Septemlier 25.1905. Serial No. 279.947.

ELECTRlC was? STOR-MOTION FOR LOQMS.

Patented June 12, 1906.

how the trip is finally restored to normal position' by the armature when the loom is started.

The loom-frame 1, lay 2, breast-beam 3, notched holding-plate4 for the spring-controlled shipper 5, the knock ofl lever 6, fulcrumed at its outer end at 7 on theplate 4, the elongated terminal 23, extended transversely of the loom below the warp-threads and mounted at'its ends in brackets 24 on the loom side, said terminal being insulated from the brackets, the lease-rods 27, seated in the brackets, the. two metal rods 28, carried by the latter adjacent the terminal 23 and at the front and rear thereof, and the substantially d-shaped -controlling-detectors 29, loosel,v

mounted Blithe rods 28, eaohhaving a warpeye 30 and a foot '34 teat times contact with the under side of the terminal 23 (as when a -warp-thrcad breaks or runs out,) may be and are all substantially as in United States Pat ent No. 796,563, granted to me August 8,

-105, and operate as therein described.

provided with a lateral head '12, having a eveled face 13, Figs. 3 and 4, aspring l4 normally retracting the armature against a stop-pin 15, as in'Fig. 1, andinfull lines, Fig. 3. U on the upper portion of thebracket 11. is in crumed at 16 a trip or dog 17, having its tail enlar ed at 18 and, adapted to rest on thehead of t e armature, the latter thus actin as a detent for the trip, the front end of the latter being upturned at 19 to at times be engaged by a hunter 20 on the lay when the latter is on its backward stroke, as will be ex plained.

'An elongated slot 17 in the forward part of the dog loosely receives the bent end of a 4 link 40, connected at its front end with alever 41, fulcrumed on the breast-beamjat 42,

the upper end of said lever bearingagainst the back of the knock-off lever 6, so that the latter will be moved to release the shipper when the link is moved rearward to thereby effect stoppage of the loom through any suitable'stoppmg means.

In Fig. 1 I have shown the electr'omagnet as included in an operating electric circuit, a

23, and at the other side with the electromagnet 8 by a wire 45, the other end 46 of the wire leading from the magnet-coils to one 'member 47 of a switch or circuit-changer mounted on and insulated from the loom-' frame and adapted to contact with. a lug 6 on the knock-oil lever when the shipper IS in running position. (See Fig. 2.)

The metallic rods 28, Fig. 1, are in electrical connection with the circuit through the brackets 24, loom sides, knock-E lever 6, and circuit-changer 6 47, as will be obvious, the circuit being broken or open between the terminal 23 and the rods 28, which latter are also terminals of the operating-circuit, as in my patent referred to. Now when the loom is running properly the magnet 8 is deenergized and the armature 9'is held against the stop 15, the head 12 acting upon the tail of the dog or trip to elevate it and depress the upturned portion 19 below the path of the hunter 20 as the lay reciprocates. When, however, a warp-thread breaks or fails, its

detector 29 in one of the two series on the rods 28 "will be released, and it will rock, closing the circuit when its foot 34 contacts with the terminal 23 and energizing the magnet. The armature 9 is attracted and moved into dotted-line position, Fig. 3, thereby releasing the trip 17, which latter turns by the weight of its tail 18 into the intermediate dotted-line position, the slot 17 permitting this movement',whicl1 brings its upper end 19 into the path of the hunter 20 as the lay is moving back. Such engagement of the hunter and the end 19 of the trip causes the trip to move into the second dotted-line position, Fig. 3, as the lay completes its backward stroke, pulling the link 40 rearward and through levers 41 and 6 releasing the shipper. Inimediatelg the circuit is broken at 6 17, thus deenergizing the magnet and preventing waste of'electrical energy. When the lay is moving back, the warps are in full tension, and hence a slack thread cannot cause the operation of the stop-motion, because it is only on the backward stroke of the lay that the buntr can cooperate with the trip, as described. Should a slack thread cause its detector to close the operating-circuit on the forward stroke of the lay, thereby energizing the mag net and attracting the armature, the tightening of the thread as the lay begins to move back will reopen the circuit and permit the spring 14 to retract the armature and restore the trip to normal position before it can be en aged by the hunter.

I ter the stop-motion has effected loomstoppage, as described, the broken warpthread is pieced up and the movement of the shipper 5 to running position returns the levers 6 and 41 to normal position, the link 40 seaese thereupon acting to restore the trip 17 to its intermediate position, (shown in Fig. 4-,) and then the pull of the spring 14 causes the. beveled face 13 of the armature-hen d 12 to act as a cam against the tail of the trip, completing ,mature, the slot 17" in the trip permitting a certain amount of relative movement of the trip and link 40 both during the resetting and the movement of the trip into position to be engaged by thebunter.

While I have shown one convenient Form of control of the operating electric circuit by or through breakage of a \i'arp-tlnead, my invention is not restricted to such particular mechanism, as any other suitable means for controllin the electric circuit by or through warp-brea (age can be used.

Having fully described my invention, what I claim as new, and desire to secure by Let ters Patent, is

1. In a loom, in combination, a lay provi dcd with a hunter, means, including a normally inoperative member, adapted to efl'cct the operation of a stopping instrumentality, an operating electric circuit controlling the position of said member, and means to change the condition of the circuit by or through breakage of a warpthread, such change causing the operative positioning of said member in the path of and to be engaged by the hunter on the backward stroke of the lay.

2. In a loom, in combination, a lay provided with a hunter, means adapted to cfl'ect the operation of a stopping instrumentality, said means including a trip, and a detent to normally maintain it out of the path of the hunter, an operating electric circuit to control the detent, and means to change the condition of the circuit by failure of a warpthread, such change acting to disengage the trip and detent and permitting the former to move into the path of and to be engaged by the hunter on the backward stroke of the lay.

3. In a loom, in combination, a lay, means adapted toefiect the operation of a stepping instrumentality, an operating electric circuit to cause said means to be actuated on the backward stroke of the lay upon a change in the condition of the circuit, and circuitchanging means operated by or through failure of a warp-thread. 4. In a loom, in combination, a lay, a shipper, releasing means therefor operative only upon the backward stroke of the lay, and an electric warp-stop-motion mechanism to control said releasing means and render the same operative upon failure of a warpthread.

5. In a loom, in combination, a lay, a shipper. a knoek-ofl lever therefor, means to trio circuit, an electromagnet included there cause the operation thereof by the lay on its backward stroke, and an electric warp-stop' motion mechanism to control said means and render the same operative upon failure of a cause the operation thereof by the lay on its backward stroke, said means including a nor.-' mally inoperative trip, and a detent therefor,

- an electromagnet and an operating electric I render the same operative.

circuit in which it is included, to govern the detent, and means to change the normal con dition of the' circuit upon failure of a warpthrea'd, such change actin through the magnet and detent to release t e trip and thereby I 7. In a loom, in combination, a lay pro-. vided with a-bunter, shipper, a knock-0H lever therefor, a trip adapted to be engaged and moved by the hunter on the backward,

stroke of the lay, a'lost-motion connection between the knock-off. lever and trip, to opcrate the former by bunter-induced movement of the latter, a normally open operating elecin, an armature for the magnet, to normally retain the trip in inoperatlve position, and

means to 'close the circuit and energize the magnet upon breakage of a warp-thread,-

consequent retraction of the armature releasing the trip, the lost-motion. connection between it and the knock-off lever permitting the trip to move into position to be operatively engaged by the hunter;

8. In a loom, in combination, a lay 'provided with a hunter, a shipper, a knock-oif lever therefor, arocking trip adapted to be engaged and moved by the hunter on the backward stroke of the lay,'a lost-motion connection between the knock-off lever and the trip, to operate the former by hunter-induced movement of the latter, a normally, ogren operating electric circuit closed by. or t ough failure of a warp-thread, an electromagnet included in, said. circuit, its armature having a beveled head to cooperate with the trip and retain it inoperative, and a spring to retract the armature, closing of the circuit energizing the magnet and attracting the armature to release the trip and permit it to move into position to be operatively engaged by the hunter, to e'ifect shipper-release, return of the shipper to running position acting through the knock-ofi lever and lost-motion connection to partly resetthe tri the beveled head of the armature complieting' such resetting by or through the retracting action of its spring;

In testimony whereof} have signed my name to this specification in the presence of two subscribing Witnesses.

,- 1 GEORGE CHANDLER, Witnesses EDWARD G. HALL, SAMUEL H. LORD. 

